What is a close approximation of a z multiplier for a 95% confidence interval?
2
100
It's reported that the average student loan debt in our country is $30,000. I think it's higher at Edgewood. I do a study of 100 EC students and find it is $31,000. What is the null hypothesis?
H-null: mu=$30,000.
100
What symbol's represent the following:
Sample mean?
Population mean?
Sample proportion?
Population Proportion?
X-bar
mu
p-hat
P
100
What test would you use?
What is the average number of pictures Edgewood College students send on snapchat?
Confidence interval for one population mean.
100
What is a helpful song you can sing if you get stuck on a sampling distribution problem?
Z-scores give you probability, probability gives you Z-scores.
200
How is standard error of a mean different then the standard deviation of the mean?
The standard error is an estimate of the standard deviation.
200
It's reported that the average student loan debt in our country is $30,000. I think it's higher at Edgewood. I do a study of 100 EC students and find it is $31,000. What is the alternative hypothesis?
HA: mu is greater then 30,000.
200
The mean number of dollars left on meal plans the last week of the semester is $150. If I sample 45 students what is the mean number of dollars left on their meal plans?
$150.00
200
What test would you use?
Are more then 20% of animals returned to animal shelters after they've been adopted?
Hypothesis Test for one population proportion
200
A researcher wants to know how many hours A students study math. What is the research question of interest?
What is the average number of hours A students study math?
300
42 college students were asked "How many times a year do you eat pizza?" The average answer was 79 with a standard deviation of 15.
I think it's closer to 100. Use a 95% confidence interval to tell me if I am right.
The 95% confidence interval is about 74-84 pizza.
Karen is wrong.
300
It's reported that the average student loan debt in our country is $30,000. I think it's higher at Edgewood. I do a study of 100 EC students and find it is $31,000. What is my sample statistic? (with notation)
p-hat = $31,000
300
The mean number of dollars left on meal plans the last week of the semester is $150 with a standard deviation of $7.50. If I sample 45 students what is the standard deviation of the sample?
$1.12
300
What test should you use?
Do first year college students spend more then $5,000 on textbooks each year?
Hypothesis test for one population mean
300
A researcher wants to know how many hours A students study math. What symbol will represent the population parameter for this question?
Mu
400
In a group of 88 15 year old, 37 stated they have already driven a car.
Determine a 99% confidence interval for the proportion of 15 year olds who have already driven.
0.285-0.555
28.5%-55.5%
400
It's reported that the average student loan debt in our country is $30,000. I think it's higher at Edgewood. I do a study of 100 EC students and find it is $31,000. What is the my 'n'?
100.
400
The mean number of dollars left on meal plans the last week of the semester is $150 with a standard deviation of $7.50. If I sample 45 students what is the probability their mean is greater then $180?
It is so small that the probability of it happening is almost zero.
400
What test would you use?
What proportion of Edgewood College students are in favor of the new residence hall?
Confidence interval for one population proportion.
400
A researcher wants to know how many hours A students study math. What symbol will represent the statistic?
x-bar
500
A researcher was interested in the difference of hours spent on facebook for men and women. He finds that men spend about 8 hours per week and women spend 9.5 hours per week. The standard deviation for men was 2.3 and for women 4.5. What is the value for the mean difference?
0.5
500
It's reported that the average student loan debt in our country is $30,000. I think it's higher at Edgewood. If I compute a p-value of 0.04, what can I say?
I have evidence that the average is higher at EC.
500
On a recent survey 45% of students said they experienced harassment in high school. In a sample of 100 students what is the probability that a majority of them experienced harassment in high school?
84% or 0.84
500
What test would you use?
Is there a relationship between the type of car you have and the number of times you exercise per week?
Chi-Square test.
500
A researcher wants to know how many hours A students study math. She surveyed 38 students and found the average number of hours to be 6 per week. What is the value for the statistic?